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Finding the Fourth Proportional to 254,191.64, 381,203.87 and 85,666.55

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Solution

The fourth proportional to 254,191.64, 381,203.87 and 85,666.55 is: 128,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,191.64 : 381,203.87 = 85,666.55 : x
  2. Step 2: Convert to fraction form
    254,191.64/381,203.87 = 85,666.55/x
  3. Step 3: Cross multiply
    254,191.64x = 381,203.87 × 85,666.55
  4. Step 4: Simplify right side
    254,191.64x = 32,656,418,055.20
  5. Step 5: Solve for x
    x = 32,656,418,055.20/254,191.64
  6. Step 6: Final answer
    x = 128,471.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.